Where to find switched power source

[neoific]

Hey, newby here. I have a quite a few 2 way radios wired up along with some backlit switches on my '08 V6 2wd XLT. I've picked up a high-amperage SPST relay to throw the power for these things on, but I cannot for the life of my find a switched +12v source to switch the relay. I don't have a fusewhatever and would prefer to snag it from somewhere in the center console or head unit area. I have the center console and radio out right now, playing around with the multimeter, but I cannot figure it out! The blue/black and blue/red lines going to the radio seem to be constant...

Help!

 

[neoific]

Nobody can tell me? :thumbdwn: I just wanna get this wired up right, and I don't want to have to run another thing through my firewall! No takers?